Favorites virtual folder doesn't respect patch prev/next

[mkruselj]

1. Select a favorite patch
2. Press prev/next patch either on UI or via keyboard shortcuts

Result: Jog happens within the folder of that favorite patch, instead of within Favorites folder.

Not sure if there's an easy solution to this, but maybe:

1. If the preset was loaded from the Favorites menu, or from Favorites virtual folder in patch browser, make sure prev-next patch is only going through that virtual folder (of course, obeying the "Previous/Next patch constrained to current category" option)
2. If we're just browsing through the patch browser, search patch or prev/next category/patch, don't go through the Favorites virtual folder if you stumble upon a favorite patch.